Dragon blood is the blood of any of the many species of dragon. It has a number of magical properties, and was fairly expensive to buy bottled. It has at least twelve uses, the discoveries of which are typically all credited to the famous Hogwartsheadmaster, Albus Dumbledore, although Ivor Dillonsby claimed that he had already discovered eight of them and that Dumbledore "borrowed" his notes.

Dragon blood seems to have a notable taste, as Dumbledore was able to distinguish it from human blood by placing a small amount in his mouth in 1996. He was, however, the foremost expert on the substance, and the distinction may not have been notable to anyone else.